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Administrative Assistant

Career Area: Administrative Support
City: Maryland
State: Maryland
Country: United States
Job Description



Performs administrative and office support activities in a busy office environment. Duties will include data processing, creating detailed spreadsheets and presentations, proficiency in timekeeping, military time conversion, invoicing, billing and payroll for 105+ employees daily. Extensive software skills are required along with strong communication skills and problem-solving ability.




  • Perform detail-oriented tasks, within strict time constraints, to maintain accurate payroll and timekeeping.
  • Conduct quality control checks of all payroll entries weekly and initiate personnel related employee changes including, but not limited to, pay, direct deposit, etc.
  • Enter purchase requisitions and work to ensure requested equipment, uniforms or services are delivered in a timely manner.
  • Complete monthly invoices and provide data backups for submission.  
  • Create highly accurate, detailed spreadsheets and word documents to meet deliverable requirements.
  • Provide Administrative support to the Contract Manager.


  • Minimum three years of direct experience in administrative and or payroll functions within the past five years.
  • Highly proficient in Word, Excel, and Outlook applications.
  • Must be a self-starter and work well with little direct supervision.  
  • Must be organized and be highly detail oriented.
  • Ability to type a minimum of 45 words per minute.
  • Ability to interact and communicate, both oral and written, with individuals at all levels.
  • Ability to meet strict deadlines.
  • Ability to multitask and remain focused on the overall mission under stressful situations.
  • Ability to produce clear and concise reports and invoices.
  • Preferred Experience: ADP, Deltek, Costpoint, Timekeeping,  and SAP Concur experience.


Centerra offers a comprehensive, total rewards package that includes competitive compensation and a flexible benefits package that reflects its commitment to creating a diverse and supportive workplace. 


  • Medical, Vision & Dental Insurance 
  • Paid Time-Off Program & Company Paid Holidays 
  • 401(k) Retirement Plan 
  • Insurance: Basic Life & Supplemental Life 
  • Health & Dependent Care Flexible Spending Accounts 
  • Short-Term & Long-Term Disability 
  • Personal Development & Learning Opportunities 
  • On-the-job Training, Skills Development & Certifications 
  • Employee Referral Program



Infrequent travel as needed, less than 10 days per year. Work is typically in a busy indoor office environment. Business work hours consist of Monday – Friday 8:00 AM-5:00 PM in office position. ***Weekend Hours Flexible***



May be required to lift and carry awkward items weighing up to 25 lbs. Requires intermittent standing, walking, sitting, squatting, stretching, and bending throughout the workday.